<?php
/**
 * Smarty plugin
 * @package Smarty
 * @subpackage plugins
 */

/**
 * Smarty escape modifier plugin
 *
 * Type:     modifier<br>
 * Name:     escape<br>
 * Purpose:  Escape the string according to escapement type
 * @link http://smarty.php.net/manual/en/language.modifier.escape.php
 * escape (Smarty online manual)
 * @author   Monte Ohrt <monte at ohrt dot com>
 * @param string
 * @param html|htmlall|url|quotes|hex|hexentity|javascript
 * @return string
 */
function smarty_modifier_escape($string, $esc_type = 'html', $char_set = 'ISO-8859-1') {
	switch ($esc_type) {
		case 'html' :
			return htmlspecialchars ( $string, ENT_QUOTES, $char_set );
		
		case 'htmlall' :
			return htmlentities ( $string, ENT_QUOTES, $char_set );
		
		case 'url' :
			return rawurlencode ( $string );
		
		case 'urlpathinfo' :
			return str_replace ( '%2F', '/', rawurlencode ( $string ) );
		
		case 'quotes' :
			// escape unescaped single quotes
			return preg_replace ( "%(?<!\\\\)'%", "\\'", $string );
		
		case 'hex' :
			// escape every character into hex
			$return = '';
			for($x = 0; $x < strlen ( $string ); $x ++) {
				$return .= '%' . bin2hex ( $string [$x] );
			}
			return $return;
		
		case 'hexentity' :
			$return = '';
			for($x = 0; $x < strlen ( $string ); $x ++) {
				$return .= '&#x' . bin2hex ( $string [$x] ) . ';';
			}
			return $return;
		
		case 'decentity' :
			$return = '';
			for($x = 0; $x < strlen ( $string ); $x ++) {
				$return .= '&#' . ord ( $string [$x] ) . ';';
			}
			return $return;
		
		case 'javascript' :
			// escape quotes and backslashes, newlines, etc.
			return strtr ( $string, array ('\\' => '\\\\', "'" => "\\'", '"' => '\\"', "\r" => '\\r', "\n" => '\\n', '</' => '<\/' ) );
		
		case 'mail' :
			// safe way to display e-mail address on a web page
			return str_replace ( array ('@', '.' ), array (' [AT] ', ' [DOT] ' ), $string );
		
		case 'nonstd' :
			// escape non-standard chars, such as ms document quotes
			$_res = '';
			for($_i = 0, $_len = strlen ( $string ); $_i < $_len; $_i ++) {
				$_ord = ord ( substr ( $string, $_i, 1 ) );
				// non-standard char, escape it
				if ($_ord >= 126) {
					$_res .= '&#' . $_ord . ';';
				} else {
					$_res .= substr ( $string, $_i, 1 );
				}
			}
			return $_res;
		
		default :
			return $string;
	}
}

/* vim: set expandtab: */

?>
